Electric fluid-heater.



T. NASH. ELECTBIG FLUID HEATER. APPLIo'A'rIon'rILBD 1120.26. 1914.

Patented 1111112351915.Y

i .1 WU

WIT/VESSES:

* /frromvfys` THOMAS J'. NASH, 0F LINCGLN, NEBRASKA.

ELECTRIC FLUID-HEATER.

Application filed. December 26, 1914.

To all '1L-710m t may Concern Be it known that I, THQMAS J. NASH, residing at Lincoln. in the county of Lan caster and State if Nebraska. have invented a new and linpi'nred Electric Flnidlleater, of which the following is a specification.

This invention. which has reference to electric ilnitl heating means, prin'iarily has for its object to provide a heating means of the geneialcharaeter stated of; a simple and economical construction, that is readily adapted for being; pcrtaoly or permanently attached to sources of hath the fluid and lectiical supplies which may be centenYA iently .iandledu and which effectively serves its intended purposes.

Another and essential fhjeet nt' my in vention is the provision of an electric fluid heater in which there is no complete inetallic circuit and in which the circuit is completed hy the fluid and in which` as -oon as the fluid contained within the heater is exhausted, the tlew of the electric current ceases.

Again, my invention has for its purpose. to provine an electric iluid heater in which the electrmles are so designed and relatively connected to the hody of the heater. that after the fluid supply is cnt oli'. the huid that remains in the heater immediately hails dry without injury to the electredes. and thereby automatically breaks the circuit thrnugh the heater withont turning; oft the switch in the electric circuit feeder to the heater.

Furthermore, my invention comprehends an improved construction of electric heater of the general character stated having: provisinn for balancing the varying resistance of the hot'or cold watercontained within the heater to thereby prov-ide for a uniform heating of the water as it passes through the l heater.

lith other objects in yiew that will hereinat'ter appear, my invention consists of the peculiar combination and noyel arrange nient of parts, ell of which will he hereinafter fully explained-1specihcally pointed ont in the appended claims and illustrated in the accompanying drawings, in which 4Figure. 1 a perspective view et' a large type of my improved fluid heater, he saine being shown as applied t Fig. 2 1s rer use. u similar view of a smaller type ot niy heater, the same he shown in the nature of a. portalile he- .'ited ter being par Specieatcn of Letters Patent.

Patented Mar. 23, 1915.

seriai No. 879,083.

tially immersed in the fluid to be heated. Fig. 3 is a vertical section of the type of heater shown in Fig. l. Fig. i is a vertical seeticn ofthe type ot' heater shown in Fig. '2, lines a-b, a-b, being read together to complete the figure.

In carrying ont my invention. when construct-ed t0 fnrin a large type heater. as shown in Figs. l and 3, the saine includes a rod-lile electi'cde oi' core 1 (preferably carbon) that is slightly tapering troni the upper end. and the said eleetrode l is located within a tubular electrode or shell 2 (also preferably carbon) and which is tapering on the inside so that the bottom or lower end thereof is of smaller diameter than the upper end.

By reason of tapering the inner and the outer electrodes 1 and in the manner stated and shown. an annular tuliulai space or tlnid passage 3 is provided between the said two electrodes that is of less area at the bottom than at Ythe tf-lii, and un which the water ina)Y pass `and he gradually heated when the heater is in the operative candition, and since tli area of the said space or passage gradually increases vtroni the inlet to the outlet end of the heater. the cold fluid aS it enters the space end of lesser area gradually grows hitter. and the conductivity of the fluid increases. and as the area. between the walls of the electr( destiiicreases: the. resistance is thereby balanced. nr in other words. is the more Clearly eguali/.ed from one end of the heater to the other.

el designates a tubular jacket of insulat` ing material entirely inclosing the heating elements or electrodes and initiates a can designed to hold the electrodes4 in spnced relation it haring a central seat 'QO- that, forms the hearing for the centralelectiode 1, see Fig. 3.

G designates the Huid inlet to the heater, of which. when the form of heater is used, as shown in Figs. 2 and 4, there may lie a plurality and the said inlet when. as shown in Figs. l and Si may take the term ef an cnlarget area by terminating.r the outlet er tubular electrode short of the lazttoin. A rod 8 is einlieddedin the upper end ot the solid electrode l and the upper end thereof threaded t0 receive a lock nut 15 that ce oi'ierates with a dislc or washer ll of insnl lining n'iaterial fer clamping one terminal 1G ot' the electrical supply. An insulating bushing 9, that has an outwardly projecting meunier? en the rofl S anti a nie-talliebnsliing l@ also flange we that. is enetl ieet with the inwzn' r l0 en the upper enel ni? i, when the parts are as far use. A metallic washer ll is nn the upper end' of the bushing 3, held in electrical Contact with the .i0 that forms the connection im* ing 'with ther which is clamped clown by the l-l when tlie.bining nut l5, is

home.

i tire n'regfiing taken with the acu nini ing drawings, the complete con eton, the manner ef operation and the afli'antages of my invention'will be readily en of the Structural arrangement airis, my electric heater can be 1made 'lei-ent sizes to suit the requirements uiily connected with the fnid and l rees of supply.

er li ting water vcontained in veseels, fer example Fig. 2, the heater is made'as mi in fletail in Fig. 4. .hat l ciaim is:

in an electric heater, a casing of insul materiai, heating elements within the K enininirng an enter tubular elec- :inr ein i.` "'eetrode, the saicl elece. t., "la ed and insulated from each er, the space trete/een the said electroes i Minintl'i'e finiti receiving chamber, the salti eas having a ilnicli'eetl inlet in cenmnnimtinn with @ne end of tiler said chain ner, a fluid entlet in communication with the either end of the sani chamber, the opposing faces of the inner and outer electrodes being relatively shaped to 'form an annular Fluid reeeiving chamber of gradually increasing area from the inlet te the outlet end thereof. In' an electric heater, a casing heating elements within the casing, said elements comprising a tubular electrode, whose internal diameter gradually increases from one end to the other, ian inner electrode within the tubular electrode spaced and insulated` from the said tubular electrode, saidv inner terx'nirn-.lV 12 of the electrical i increasing in cross linlet progressively toward the `outlet, means electrmie eing ei grarinaily decreasing i i Y im one endtn the other, means i the eiectric eiicnit terminals e trades, a fluid feed inlet in cci'nmnr ltio'ii with tl'ie restricted endI of the space nc-,twv i the electrerles, and a inid @niiet in ceinmnnieaticn with the other end of the between the. eiectroiies.

3. in an electric heating appliance of the character stated; a tubular casing of insulating material haring a restricted neck, a eloSnie for the lower enel of the said casing, said casing having a iluicl inlet at the lower end, a tubular electrode within the casing wliesenpner end 'terminates in an intnrned flange, a` finiti ent-iet that extends ihmngli the casi ng and the upper end. ef the tubular electrode, an inner electrode located Within and spaee from the tubular electrode, the lower cnil of the said inner electrode having a bearing on the bottoni clesure of the outer easing, a md that. extens tni-Ongli the Areicted neck of the caSing and ioins with 'the inner electrcde, an insulating sleeve on enel of the rod that connects with the inner electrode, clamp nuten the upper enti of the said reti, v

fl, .ln an electric @water eater, an outer elect-mile shell., an inner' elects-erle core, said shell and core being sectional area from the for admitting water inte the space between the Said electrodes, and means for conveying Water out of the space between said electrodes.

, THOMAS Vi. NASH.

'Witnesses z y H mr `lvIA'rniEsnN GEORGE P, ELMEN.

spaced apart a distanceA 

